In evaluating a 3-year-old with sudden onset high fever and stridor, the child sits forward with the mouth open and drooling. The safest and most helpful diagnostic test to order now would be:

In evaluating a 3-year-old with sudden onset high fever and stridor, the child sits forward with the mouth open and drooling. The safest and most helpful diagnostic test to order now would be:

• A. Urine culture
• B. A lateral neck x-ray film
• C. A chest x-ray film
• D. A throat culture

Answer: (B)

When a young child presents with sudden high fever, drooling, and the child sits forward with the mouth open, epiglottitis must be considered because airway obstruction can develop rapidly. The safest and most helpful initial diagnostic test is a lateral neck radiograph. It can quickly show the epiglottis swelling, described as the “thumbprint sign,” without provoking airway irritation. This imaging helps confirm the diagnosis and guide urgent management, including airway readiness. Other options are not ideal for this scenario. A throat culture requires instrumentation of the oropharynx, which can trigger laryngospasm or sudden airway compromise in a child with suspected epiglottitis. A chest X-ray can help if lower airway infection is suspected but won’t specifically diagnose epiglottitis. A urine culture is unrelated to this presentation and would not aid in diagnosing an acute airway issue.

When a young child presents with sudden high fever, drooling, and the child sits forward with the mouth open, epiglottitis must be considered because airway obstruction can develop rapidly. The safest and most helpful initial diagnostic test is a lateral neck radiograph. It can quickly show the epiglottis swelling, described as the “thumbprint sign,” without provoking airway irritation. This imaging helps confirm the diagnosis and guide urgent management, including airway readiness.

Other options are not ideal for this scenario. A throat culture requires instrumentation of the oropharynx, which can trigger laryngospasm or sudden airway compromise in a child with suspected epiglottitis. A chest X-ray can help if lower airway infection is suspected but won’t specifically diagnose epiglottitis. A urine culture is unrelated to this presentation and would not aid in diagnosing an acute airway issue.